So I have the following PCs mixed up with an alien crash in 1960s Berlin:
The Doctor, Amy and Rory. (It’s a bit early to try and stat out Clara, I think.)
A pair of childhood friends, now student age, living on opposite sides of the Berlin Wall. Hopefully fun to play even if the players don’t go for the star-crossed lovers angle.
And a secret agent who could either be an obvious badass or an apparent nobody. Same stats, but I imagine the picture would really affect how the character was played...